Crosscut-saw.



No. 836,048. PATENTED Nov. 1a; 1906.

P. w; MoINTOSH.

* cnosscm' SAW;

APPLIOATION FILED HAB- 31, 1905- iiiiiiiiimflf PH L I v i WITNESSES: 3JD INVENTOI? 3" By v ATTORNEYS ward UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Nov. 13, 1906.

Application filed March 31, 1905. Serial No. 253,009.

To all whom it may concern.-

Be it known that I, Fnnnnnro WINSOR MOINTOsH, a citizen of the UnitedStates, and a resident of Montesano, in the county of Chehalis and Stateof Washington, have invented a new and Improved Crosscut-Saw, of whichthe following is a full, clear, and

exact description.

The invention relates to crosscut-saws for use by one or two operatorsin cutting logs for timber, felling trees, &c.

The object of the invention is to provide a new and improvedcrosscut-saw arranged to provide sufficient clearance in the kerffor thesaw-blade to pass easily through, to allow the cutting edges of thecutting-teeth to strike the wood at a more scientific angle for cuttingwithout danger of becoming timber bound or likelihood of thetooth-points being broken off in resinous or knotty timber, to readilypermit of sawing the timber without undue physical exertion on the partof the operator, and to provide a crosscut-saw which, for the reasonsstated, will lessen the necessity for frequent filings to maintain thesame in working order.

The invention consists of novel features and parts and combinations ofthe same, as will be more fully described hereinafter and then pointedout in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a side elevation of the improvement. Fig. 2 is an enlargedface view of part of the saw-blade. Fig. 3 is a transverse section ofthe same on the line 3 3 of Fig. 2, and Fig. 4 is an inverted edge viewof the same.

On the blade A of the crosscut-saw are formed pairs of cutting-teeth B Balternating with raking-teeth O of usual construction. Each tooth B- andB of a pair of cutting-teeth is formed with a vertical slot B extendingfrom the point of the tooth upward to within a distance of the base ofthe tooth, so as to form a forward member B and a rearward member B, atthe same time giving the tooth a forked appearance. The cutting edges Band B of the forward and rearcutting members are beveled and inclinedupwardly from points B B in opposite directionsthat is, the cutting edgeB of the forward member B slants upwardly and forwardly from its pointB, while the cutting edge B slants upwardly and rearwardly from itspoint B The backs B and B of the members B B are beveled on the sameface as the cutting edges B and B", it being understood by reference toFigs. 2 and 4 that the several bevels of the tooth B are on one face ofthe saw, while the bevels of the tooth B are on the opposite face of thesaw.

The cut-out portion D, separating the teeth B and B of a pair ofcutting-teeth from each other, is very narrow in comparison to thecut-out portion E between one of the cutting-teeth B or B and the nextfollowing raking-tooth C, so that the pair of cutting-teeth B B isrendered exceedingly strong and durable, and hence is not liable tobreak or become injured.

By the arrangement described the cuttingteeth B and B practically formseries of knives cutting into the timber in the direction of themovement of the saw, each tooth cutting its own proportional part of thetimber, and the tooth is prevented from cutting ni ore or deeper by theteeth on either side 0 it.

It will also be seen that by the arrange ment described thecutting-teeth cut equally on both the forward and the backward stroke,the cut made by each tooth being a shearing cut, and the cuts made bythe pair of teeth B B define the width of the kerf.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A crosscut-sawhaving pairs of cuttingteeth, andraking-teeth alternating with the pairs of cutting-teeth, each tooth ofeach pair of cutting-teeth comprising forward and rearward membersseparated by a vertical slot the sides of which are beveled from one endto the other, the cutting edges of said forward and rearward membersbeing also beveled, the several bevels being all on one face of one ofthe teeth of a pair and on the opposite face of the other tooth of saidpair, the teeth of each pair of cutting-teeth being separated by acut-out portion larger than the slot between the members of each tooth,and the pairs of said teeth being separated from the raking-teeth bycut-out portions of greater width than the first-mentioned cut outportion.

2. A crosscut-saw having pairs of cuttingteeth, and raking-teethalternating with the pairs of cutting-teeth, each tooth of each pair ofcutting-teeth comprising forward and rearward members separated; by' a:vertical slot the sides of which are beveled from one end to the other,the cutting edges of said forward and rearward members being alsobeveled and inclined upwardly in opposite directions from the pointsformed by the junction of said cutting edges and the beveled sides ofthe slots, the several. bevels being; all on one face-of the-membersconstitut i'ng one of the't'eeth of'aapair, and on' the oppositefaceofz'themembers forming the other-- toot-h: of" said pair, the teeth ofeach pai'rof cutting-teet=h= being separated from each name to thisspecification in the other by a cut-out portion larger than theslotxbetweenthe members; of eachtooth and having inwardly-tapering sideedges, and the pairsofi, said teeth being separated from theraking-teeth by cut-out portions of greater width than the saidfirst-named cut-out portion.

In testimony whereof I have signed my two subscribing witnesses.

FREDERIC WINSOR M'GINTOSH: Witnesses:

JOHN A..GHAMBERS, ROBE-RT O1 YOUNG;

presence of.

